Originally Posted by
livedarklions
Why do you think it pivots in the middle?
Because it would obviously have to? (Though I would say "curves" more than "pivots")
Basic presumption -
and yes, it is a presumption - is that the guy has unrealistic thinking in being unable to realistically weigh trade-offs, not that he's a complete and total idiot who's never ridden a bike at all.
It's clear from his handling of the model the thing is rigid.
Irrelevant when it's clear that the 3d print has no moving parts whatsoever.